Stenothemus grahami Wittmer, 1974

Yang, Yuxia, Ge, Shujuan, Yang, Xingke & Liu, Haoyu, 2021, Taxonomic revision of the species of Stenothemus from Southwest China (Coleoptera, Cantharidae), with the descriptions of five new species, European Journal of Taxonomy 757 (1), pp. 1-36 : 11-13

Stenothemus grahami Wittmer, 1974

Figs 1F , 3E , 6A‒C , 8A

Stenothemus grahami Wittmer, 1974: 60 , fig. 18.

Material examined

Paratype

CHINA • 1 ♂; [h] “Gieh Yin // Temple // Mt. Omei”, “ Aug. 10‒11, ’25 // 7500 ft. alt.”, [p] “Szechuen // CHINA // D. C. Graham”, [h] “215”, [p] “PARATYPUS”, [h-p] “ Stenothemus // grahami // Wittm. // det. W. Wittmer”, [p] “Naturhistorisches // Museum Basel // Coll. W. Wittmer ”, “ CANTHARIDAE // CANTH00003898”; NHMB .

Additional material

CHINA ‒ Gansu • 1 ♂; Longnan, Huixian, Yanping Forestry Farm ; 20 Sep. 2020; J. Li leg.; MHBU • 1 ♂, 1 ♀; Tianshui, Naiji, Baihua ; 17 Sep. 2020; J. Li leg.; MHBU • 1 ♂; Tianshui, Naiji, Guanyin ; 15 Sep. 2020; J. Li leg.; MHBU • 63 ♂♂, 14 ♀♀; same collection data as for preceding; 12 Sep. 2020; J. Li leg.; MHBU • 1 ♀; Zhugqu, Beach Forest Farm ; 2400 m a.s.l.; 14 Jul. 1999; J. Yao leg.; IZAS • 1 ♀; same collection data as for preceding; T.L. He leg.; IZAS • 1 ♂, 1 ♀; same collection data as for preceding; 2400 m a.s.l.; 16 Jul. 1999; J. Yao leg.; IZAS • 1 ♀; Wenxian, Qiujiaba ; 2350 m a.s.l.; 21 Jul. 1999; T.L. He leg.; IZAS . ‒ Henan • 1 ♂, 1 ♀; Songxian, Baiyun Shan ; 14‒17 Aug. 2008; G.D. Ren and Q.Q. Wu leg.; MHBU • 1 ♂; Xixia, Baihe ; 18 Aug. 2008; G.D. Ren and Q.Q. Wu leg.; MHBU . ‒ Hubei • 1 ♂; Xingshan, Longmenhe ; 1100 m a.s.l.; 12 Sep. 1994; S.M. Song leg.; IZAS . ‒ Shaanxi • 1 ♂; Qinling ; 30 Sep. 1980; J.R. Zhou leg.; IZAS • 1 ♂; Hanzhong, Mianxian, Miaoping ; 9 Oct. 2020; J. Li leg.; MHBU . ‒ Sichuan • 1 ♀; Jiuzhaigou ; 7‒15 Aug. 2002; M. Bai and J.F. Wang leg.; MHBU • 1 ♀; Danba, Kuiyonggou ; 26 Aug. 2005; F.M. Shi leg.; MHBU • 1 ♂; Emei Shan, Xixiangchi ; 1800‒2000 m a.s.l.; 18 Aug. 1957; F.X. Zhu leg.; IZAS • 1 ♂, 1 ♀; Nanping, Jiuzhaigou ; 2300 m a.s.l.; 7 Sep. 1983; R.Q. Wang leg.; IZAS • 1 ♀; Nanping, Jiuzhaigou ; 2300 m a.s.l.; 4 Sep. 1983; X.Z. Zhang leg.; IZAS • 1 ♂; Nanping, Jiuzhaigou ; 2600 m; 5 Sep. 1983; S.Y. Wang leg.; IZAS . ‒ Xizang • 3 ♂♂, 1 ♀; Zayü Xian, Cawarong, Longcun , Aga Inn ; 28.5430º N, 98.2348º E; 2883 m a.s.l.; 8 Sep. 20I4; H. Liu leg.; IZAS • 1 ♂, 2 ♀♀; same collection data as for preceding; 9 Sep. 2014; H.B. Liang leg.; IZAS • 1 ♂; Zayü, Cawarong ; 7500 m E of Jumuchang Inn; 28.5574º N, 98.2288º E; 3060 m a.s.l.; 10 Sep. 2014; H. Liu leg.; IZAS • 1 ♀; Zayü, Cawarong, Longpu , Tangtuila Ya kou; 28.5424º N, 98.4587º E; 3392 m a.s.l.; 15 Sep. 20 I4; H.B. Liang leg.; IZAS .

Descriptive notes

Body length (both sexes): 7.2‒10.6 mm; width: 1.5‒2.5 mm.

Male ( Fig. 1F )

AEDEAGUS ( Fig. 6A‒C ). Strongly swollen dorsally at basal part, moderately reduced apically in diameter; basal piece slightly shorter than dorsal plate of each paramere, with a large, bifurcate conjoined middle nodule at base of ventral side; ventral processes of parameres nearly parallel to each other, moderately long and slightly narrowed apically, bent dorsally in lateral view; dorsal plate obviously longer than ventral process, evenly narrowed apically, apex rounded, outer margins folded ventrally; apical parts of laterophyses compressed and next to each other, apex acute and directed laterally, distinctly exceeding emargination between dorsal plates.

Female ABDOMINAL STERNITE VIII ( Fig. 3E ). Obliquely narrowed posteriorly and slightly sinuate, lateroapical angles obtusely triangular, posterior margin deeply and triangularly emarginate in middle and widely

truncate on both sides.

INTERNAL ORGAN OF REPRODUCTIVE SYSTEM ( Fig. 8A ). Vagina elongate, with median oviduct situated at ventroapical part, vagina abruptly narrowed in apical part and extended into a long duct which diverticulum and spermathecal duct are arising from; diverticulum relatively short, about 0.29 times adult body length, evenly thinned apically, slender tube-shaped and spiral; spermathecal duct slightly long but much shorter than diverticulum; spermatheca slender tube-shaped and spiral, obviously thinner than spermathecal duct and much longer than diverticulum, with basal part extended into a short tube, at opening of accessory gland. Accessory gland thin in basal part and the remainder moderately thin, nearly as long as spermatheca.

Distribution

China (Shaanxi, Gansu, Henan, Hubei, Sichuan, Xizang). New records for Shaanxi, Gansu, Henan, Hubei, Xizang.

Remarks

The female reproductive system and dorsal and lateral views of the aedeagus for this species are described and illustrated for the first time.

Figures

Fig. 1. Habitus, dorsal view.A. Stenothemus benesiŠvihla, 2004, holotype, ♂ (NMPC). B. S. shaanxiensis Švihla, 2004 stat. nov., holotype, ♂ (NMPC). C. S. davidi (Pic, 1926) comb. nov., holotype, ♀ (MNHN). D. S. diffusus Wittmer, 1974, paratype, ♂ (NHMB CANTH00003518). E. S. dundai Švihla, 2004. holotype, ♂ (NMPC). F. S. grahami Wittmer, 1974, paratype, ♂ (NHMB CANTH00003898). Scale bars = 1.0 mm.

Fig. 3. Abdominal sternite VIII of female, ventral view. A. Stenothemus shaanxiensis Švihla, 2004 stat. nov. (IZAS, Shaanxi). B. S. davidi (Pic, 1926) comb. nov. (IZAS, Shaanxi). C. S. diffusus Wittmer, 1974 (MHBU, Sichuan). D. S. dundai Švihla, 2004 (MHBU, Sichuan). E. S. grahami Wittmer, 1974 (IZAS, Gansu). F. S. jindrai Švihla, 2004 (IZAS, Sichuan). Scale bars = 1.0 mm.

Fig. 6. Aedeagus (A, D, G = ventral view; B, E, H = dorsal view; C, F, I = lateral view).A‒C. Stenothemus grahami Wittmer, 1974 (MHBU, Henan). D‒F. S. minutissimus (Pic, 1933) comb. nov. (IZAS, Sichuan). G‒I. S. gracilis Y. Yang & X. Yang sp. nov. (MHBU HBU(E) 410022). Scale bars = 0.5 mm.

Fig. 8. Female reproductive system, ventral view. A. Stenothemus grahami Wittmer, 1974 (IZAS, Gansu). B. S. jindrai Švihla, 2004 (IZAS, Sichuan). C. S. minutissimus (Pic, 1933) comb. nov. (IZAS, Sichuan). D. S. tryznai Švihla, 2004 (IZAS, Sichuan). Abbreviations: see Material and methods. Scale bars = 0.5 mm.